I can't acces my HP 9144 at the moment but I opened up a 7946 whitch has a
9144 tapedrive build in.
And the sizes of the capstan are consistent with the ones you're measured.
OK...
So now it's for me the question where did I
measured the other sizes
.................
Hmmm.. If it was HP, it's not something like the roginal size of the
HP98x5 capstan, is it?
-tony